Question

Write a script to automate the creation of new users and groups in Linux. ( I would like step by step instructions, including how to create the file) you can use user 1- user 5 as example.

Answer 1

Shell Script

#!/bin/bash

while [ x$username = "x" ]; do

read -p "Please enter the username you wish to create : " username

if id -u $username >/dev/null 2>&1; then

echo "User already exists"

username=""

fi

done

while [ x$group = "x" ]; do

read -p "Please enter the primary group. If group not exist, it will be created : " group

if id -g $group >/dev/null 2>&1; then

echo "Group exist"

else

groupadd $group

fi

done

read -p "Please enter bash [/bin/bash] : " bash

if [ x"$bash" = "x" ]; then

bash="/bin/bash"

fi

read -p "Please enter homedir [/home/$username] : " homedir

if [ x"$homedir" = "x" ]; then

homedir="/home/$username"

fi

read -p "Please confirm [y/n]" confirm

if [ "$confirm" = "y" ]; then

useradd -g $group -s $bash -d $homedir -m $username

fi

Sample Result

sudo ./linux_user.sh

Please enter the username you wish to create : user 1

Please enter the primary group. If group not exist, it will be created : group 1

Please enter bash [/bin/bash] :

Please enter homedir [/home/user 1] :

Please confirm [y/n] y

22:12:58 [test@Desktop] :~ id group 1

uid=1003(group 1) gid=1003(group 1) groups=1003(group 1)

Learn Above Script Line by Line

#Write to console ask to enter group and save input to group variable

read -p "Please enter the primary group. If group not exist, it will be created : " group

#check if group already exist

if id -g $group >/dev/null 2>&1; then

#just warn that group already exist

echo "Group exist"

else

#if group not exist – create one more

groupadd $group

fi

#end of while loop

done

#ask to enter preferred bash

read -p "Please enter bash [/bin/bash] : " bash

#check if no input

if [ x"$bash" = "x" ]; then

#if no input, use default bash

bash="/bin/bash"

fi

#ask to enter preferred homedir

read -p "Please enter homedir [/home/$username] : " homedir

#check if no input

if [ x"$homedir" = "x" ]; then

#if no input , use default homedir

homedir="/home/$username"

fi

#ask to confirm all inputs

read -p "Please confirm [y/n]" confirm

#if input y

if [ "$confirm" = "y" ]; then

#command to add user with all entered info

useradd -g $group -s $bash -d $homedir -m $username

fi

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hoping the description is enough........